@article{01066096,
title = {An axiomatic approach for the Haj\'os theorem.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {38},
year = {1997},
pages = {241-248},
zbl = {0885.20033},
language = {en},
url = {http://dml.mathdoc.fr/item/01066096}
}
Corrádi, Keresztély; Szabó, Sándor. An axiomatic approach for the Hajós theorem.. Beiträge zur Algebra und Geometrie, Tome 38 (1997) pp. 241-248. http://gdmltest.u-ga.fr/item/01066096/